Notepad++ UDL: exists in GitHub repo at
Visual Studio Integration\notepad++userDefinedLang_les.xml
with a second version for black background: notepad++userDefinedLang_les_dark.xml
The UDL file cannot fully support LES (e.g. no nested comments) but it works pretty well.

MiniTestRunner: Unit test and benchmark runner

Work stopped, may not restart (I burned out trying to figure out how to do sandboxing and appdomains and how to seamlessly update the result tree when reloading a DLL and rerunning tests).